Mariner Deep
Extended Duration Ocean Bottom Node
PRODUCT DETAILS
Featuring 10Hz geophones, Mariner Deep is designed for extended-duration seabed ocean bottom seismic data acquisition. Nodes can be deployed in depths exceeding 3,048 meters (10,000ft) with continuous recording for up to 200 days.
Featuring low frequency geophones, Mariner Deep is the next generation deepwater ocean bottom node designed for extended-duration ocean bottom seismic data acquisition. Each ocean bottom node features an internal heading sensor and uses all Geospace designed and manufactured sensor components including Deepender 5000-X hydrophone and three-component geophones. The built-in full resolution test generator offers users the added security of a fully functional recorder capable of low-frequency, high-fidelity data acquisition. The Mariner Deep has a flat pad, which an ROV can use to lift the device and place it in position.
Features
- Continuous, cable-free 4C autonomous recording
- Low frequency 10 Hz geophones
- Battery module: 200 days operation
- Built-in, full-resolution test generator
- Solid-state flash memory: 32 GB per channel
- Internal Heading Sensor
- 3 Component Magnetic Sensor
- ±5° Accuracy
- Measurements written to header every 2,000 samples
GS-ONE OMNI 10 HZ Geophone
Physical Specifications
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Moving Mass
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13.2g
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0.466 oz
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Maximum coil excursion p-p
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6.10 mm
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0.240 in.
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Minimum coil excursion p-p
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0.89 mm
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0.035 in.
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Diameter
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30.5 mm
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1.2 in.
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Height
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43.2 mm
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1.7 in.
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Weight
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125 g
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4.40 oz
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Operating and Storage Temperature Range
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–40°C to +100°C
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–40°F to +212°F
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Electrical Specifications
All parameters are specified with 7.5 kΩ load at 25°C in all tilt positions unless otherwise stated.
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Frequency
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10 Hz
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Spurious Frequency
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150 Hz
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Open Circuit Sensitivity
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100V/m/s (2.55 V/i/s)
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Resistance with Shunt
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2500 Ω
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Sensitivity at 70% Damping
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85 V/m/s (2.15 V/in/s)
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Total Damping
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70%
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Distortion at all tilt angles
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<0.2% measured at 12 Hz with 0.1 in/s p-p
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Hydrophone
Physical Specifications
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Maximum Operating Pressure
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30.4 MPa (4,400 psi)
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Maximum Working Depth
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3,048 m (10,000 ft.)
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Operating Temperature Range
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–10 to +75°C (+14 to 167°F)
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Electrical Specifications
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Nominal Capacitance(at 25°C 1atm)
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10.0 nanofarads
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Voltage Sensitivity
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8.9 μV/μBar
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Sensitivity (dBv ref 1μPa @ 25°C)
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–201 dB re 1V/μPa
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Frequency Response (into 2 MΩ load)
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1 –30,000 Hz
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Mechanical Specifications (Housing)
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Metric
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US
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Length
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358 mm
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14.1 in.
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Width
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222 mm
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8.8 in.
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Height
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118 mm
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4.7 in.
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Weight in Air
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18 kg
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39.6 lbs.
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Weight in Seawater
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12 kg
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26.4 lbs.
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Maximum Operating Pressure
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30.4 MPa/304 Bar
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4,400 psi
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Maximum Operating Depth
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3,048 M
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10,000 ft.
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Operating Temperature Range
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–5°C to +60°C
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+23°F to +140°F
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Storage Temperature Range
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–10°C to +60°C
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+14°F to +140°F
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ELECTRICAL SPECIFICATIONS
Digitized 4C Recording Station: 4 Channel, 24 Bit A/D Digitizer 3C Orthogonal oriented GS-One OMNI 10Hz -Geophones 1 Hydrophone
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Digitization
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24-bit Delta-Sigma
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Sample Interval
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0.5, 1, 2, 4 ms
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Pre-amplifier Gains
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0, 6, 12, 18, 24, 30, 36 dB
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Maximum Input Signal
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1.8 Vrms
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Equivalent Input noise (@2ms sample interval)
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0.12 μVrms
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Gain Accuracy
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Better than 1%
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Anti-alias Filter
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83% Nyquist
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Instantaneous Dynamic Range
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129dB @ 2 ms sample interval
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THD
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<0.2%
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Distance Between Digitizer & Farthest Sensor
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<18 cm
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Distance Between All Sensors
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<11 cm
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Flash Memory
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32 GB per channel
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Frequency Response
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1 Hz – 825 Hz @ 1/2 ms sample interval
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Battery Module
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200 days operation
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